SDWebImage 加载Https自签名证书时的图片问题

你是否遇到了这种情况，好不容易把自签名HTTPS证书配置好了，访问https接口也成功了，但是图片加载不出来？

传了SDWebImageAllowInvalidSSLCertificates 还是没效果没效果（这种情况只适用于CA我觉得），

并且一直 HTTP load failed (error code: -999 [1:89])，

经过不懈努力，终于找到了在不修改SDWebimageDownloader.m源码的情况下的解决方案；

通过创建SDWebimageDownloader的分类来实现，如下：

.h 文件

1 #import "SDWebImageDownloader.h"

 @interface SDWebImageDownloader (AFNHttps)

 @end

 #import <SDWebImageDownloader.h>
 #import "SDWebImageDownloader+AFNHttps.h"

 @implementation SDWebImageDownloader (AFNHttps)

 + (void)load {
　　　　 //设置SDWebImageDownloader的证书
     [SDWebImageDownloader sharedDownloader].urlCredential = [self myUrlCredential];
 }

 + (NSURLCredential *)myUrlCredential {

     NSString *thePath = [[NSBundle mainBundle] pathForResource:@"p12证书名" ofType:@"p12"];
     //倒入证书       NSLog(@"thePath===========%@",thePath);
     NSData *PKCS12Data = [[NSData alloc] initWithContentsOfFile:thePath];
     CFDataRef inPKCS12Data = (__bridge CFDataRef)PKCS12Data;

     SecIdentityRef identity = NULL;
     // extract the ideneity from the certificate
     [self mosM_extractIdentity:inPKCS12Data toIdentity:&identity];

     SecCertificateRef certificate = NULL;
     SecIdentityCopyCertificate (identity, &certificate);

     return [NSURLCredential credentialWithIdentity:identity certificates:nil persistence:NSURLCredentialPersistencePermanent];;
 }

 + (OSStatus)extractIdentity:(CFDataRef)inP12Data toIdentity:(SecIdentityRef*)identity {
     OSStatus securityError = errSecSuccess;
     CFStringRef password = CFSTR("p12证书密码");
     const void *keys[] = { kSecImportExportPassphrase };
     const void *values[] = { password };
     CFDictionaryRef options = CFDictionaryCreate(NULL, keys, values, , NULL, NULL);
     CFArrayRef items = CFArrayCreate(NULL, , , NULL);
     securityError = SecPKCS12Import(inP12Data, options, &items);
     if (securityError == )
     {
         CFDictionaryRef ident = CFArrayGetValueAtIndex(items,);
         const void *tempIdentity = NULL;
         tempIdentity = CFDictionaryGetValue(ident, kSecImportItemIdentity);
         *identity = (SecIdentityRef)tempIdentity;
     }
     if (options) {
         CFRelease(options);
     }
     return securityError;
 }